藏东南地区农田土壤功能营养元素分布研究  

Study on Distribution of Functional Nutrient Elements in Farmland Soil in Southeast Xizang

作　　者：谢程 侯磊[1,2] 林文[3] 许晨阳 赵刚[1] 葛佳存 安维江 王张民 XIE Cheng;HOU Lei;LIN Wen;XU Chenyang;ZHAO Gang;GE Jiacun;AN Weijiang;WANG Zhangmin(Resources and Environment College,Xizang Agricultural and Animal Husbandry University,Nyingchi,Xizang 860000,China;Key Laboratory of Forest Ecology in Tibet Plateau(Xizang Agricultural and Animal Husbandry University),Ministry of Education,Nyingchi,Xizang 860000,China;College of Agriculture,Shanxi Agricultural University,Jinzhong,Shanxi 030801,China;College of Resources and Environment,Northwest A&F University,Yangling,Shaanxi 712100,China;College of Environmental Science and Engineering,Suzhou University of Science and Technology,Suzhou,Jiangsu 215009,China;Jiangsu Province Selenium Bioengineering Technology Research Center,Suzhou,Jiangsu 215123,China)

机构地区：[1]西藏农牧学院资源与环境学院,西藏林芝860000 [2]西藏高原森林生态教育部重点实验室,西藏林芝860000 [3]山西农业大学农学院,山西晋中030801 [4]西北农林科技大学资源环境学院,陕西杨凌712100 [5]苏州科技大学环境科学与工程学院,江苏苏州215009 [6]江苏省硒生物工程技术研究中心,江苏苏州215123

出　　处：《土壤》2024年第5期1120-1128,共9页Soils

基　　金：西藏农牧学院–西北农林科技大学联合项目(XNLH2022-04);西藏农牧学院青年基金项目(NYQNKY2023-05);2024年中央财政支持地方高校发展改革专项资金项目(JD2024-05)资助。

摘　　要：硒(Se)、锌(Zn)、钙(Ca)、铁(Fe)等元素对人体健康具有积极作用,这些功能矿物质营养在土壤中的含量一定程度上影响作物中对应元素的含量。为了解藏东南地区农田土壤功能营养元素分布及可能的影响因素,本研究以西藏自治区林芝市5个县(区)的农田土壤及作物为研究对象,分析土壤及作物中全量Se、Zn、Ca、Fe的含量水平。研究表明:研究区农田土壤Se、Zn、Ca、Fe含量范围分别为0.00~0.48 mg/kg、37.96~194.17 mg/kg、2.41~7.30 g/kg、10.20~34.35 g/kg。供试土壤样品中,64%尚未达到Se适量水平,85%的Fe含量未达到中等水平,76%的Zn含量达到中等及丰富水平。农田土壤Se、Zn、Ca、Fe含量有随海拔升高而减少的趋势。作物籽粒中Se、Zn、Ca含量与土壤中对应元素含量间无显著相关性,土壤Fe含量与作物籽粒Fe含量显著正相关(P<0.05)。综上,藏东南地区农田土壤整体上缺Se、Fe,但存在较多富Zn土壤。部分区域的富Zn农田可进一步跟踪研究,充分利用土壤资源开发地方特色农副产品。Selenium(Se),zinc(Zn),calcium(Ca),iron(Fe)and other elements have positive effects on human health,and the contents of these functional mineral nutrients in soil affects their contents in crops to a certain extent.In order to understand the distribution and possible influencing factors of functional nutrient elements in farmland soils and crops in Southeast Xizang,this study analyzed the contents of total Se,Zn,Ca and Fe in farmland soils and crops in 5 counties(districts)of Nyingchi City of Xizang.The results showed that the contents of total Se,Zn,Ca and Fe in farmland soils were 0–0.48 mg/kg,37.96–194.17 mg/kg,2.41–7.30 g/kg and 10.20–34.35 g/kg,respectively.Among the tested soil samples,64%did not reach the appropriate level of Se,85%did not reach the medium level of Fe,76%reached the medium and abundant levels of Zn.The contents of Se,Zn,Ca and Fe in farmland soils decreased with the increase of altitude.There was no significant correlation in Se,Zn and Ca contents between grain and soil except Fe which had significant positive correlation(P<0.05).The above results showed that the farmland soil in Southeast Xizang is deficient in Se and Fe,but there are more Zn-rich soils.The zinc-rich farmlands in some areas can be further tracked and studied to make full use of regional soil resources to develop local characteristic agricultural and sideline products.

关 键 词：功能营养元素 土壤 农田 藏东南 

分 类 号：S158.3[农业科学—土壤学]